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Gas pressure feed device

a feed device and gas pressure technology, applied in mechanical devices, container discharging methods, container filling methods, etc., can solve the problem of reducing the amount of vaporized gas released, and achieve the effect of suppressing the rise in gas pressure in the system

Active Publication Date: 2018-03-15
CHIYODA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The gas pressure feed device can effectively prevent the pressure in the system from rising without causing excessive complexity in the control system. This makes the system simpler and reduces the risk of it becoming too large.

Problems solved by technology

Further, returning the vaporized gas to the liquefied gas storage tank via the liquefied gas return line reduces the amount of releasing the vaporized gas in the line from the safety valve and the amount of vaporized gas to be processed with the flare stack.

Method used

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Examples

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Embodiment Construction

[0034]Hereinafter, embodiments of the present invention will be described with reference to the drawings. The gas pressure feed device 1 of the present embodiment is, for example, installed in manufacturing facilities, storage facilities, receiving facilities, etc. for liquefied natural gas (LNG), and is intended to pressuredly-feed gas from the upper process to the downstream process. Here, as the gas that is subject to be pressuredly-fed, such various gases are exemplified as natural gas that is raw material gas, refrigerant gas for cooling natural gas, boil-off gas generated by natural gas being vaporized, supply gas for sending to the utilization system.

[0035]As shown in FIG. 1, the gas pressure feed device 1 is connected with a gas supply line A for supplying gas from an upstream process and a gas sending line B for sending compressed gas to the downstream process. Here, as the upstream process or the downstream process, various types are present corresponding to the type of th...

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PUM

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Abstract

Provided is a gas pressure feed device including a compression device for compressing gas supplied from the upstream process and sending the gas to the downstream process, a shut off device provided in the downstream further than the compression device for shutting off the gas heading toward the downstream process, and a recirculation device for recirculate the gas shut off by the shut off device to the upstream of the compression device. The shut off device includes a first port on a primary side for introducing the gas from the compression device, a second port on a secondary side for sending the gas to the downstream process, a third port on the secondary side for sending the gas to the recirculation device, and a switching device for switching the gas heading toward the secondary side to either the second port or the third port.

Description

TECHNICAL FIELD[0001]The present invention relates to a gas pressure feed device compressing various gases supplied from the upstream process with a compressor or the like and sending the gases to the downstream process.BACKGROUND ART[0002]Conventionally, for example, in manufacturing facilities, storage facilities and receiving facilities producing liquefied gas (liquefied natural gas (LNG), liquefied petroleum gas (LPG), etc.), various gases such as raw material gas, refrigerant gas, boil-off gas, supply gas, etc. are pressurized to appropriate pressure levels from low pressure to pressure and then transferred using various pipe paths. In order to prevent device breakage due to excessive rise in gas pressure in system, such method is used of transferring the gas to a flare facility by relieving from pressure safety valves installed on to the paths, and burning the gas to discard in the flare facility (for example, refer to Patent Document 1).[0003]In the liquefied gas storage faci...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F17D1/04F16K11/087F17D3/01F17C13/04
CPCF17D1/04F16K11/087F17D3/01F17C13/04F16K11/0873Y02E60/32Y02E60/34
Inventor IKEDA, TAKESHI
Owner CHIYODA CORP